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错觉：挤出一块小空间
Author:
靳道阳
GeoGebra
New Resources
第八周作业
球體建築師
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
Discover Resources
閱讀鐘面及數字鐘（時和分）
方格紙上畫正方形2
angle at centre vs angle at circumference
平方根
三角函數 描點作圖 新版
Discover Topics
Symmetry
Geometric Distribution
Arithmetic Operations
Centroid or Barycenter
Geometric Transformations